Yeah, it's always been my pet fanon that Cloud is one of Shinra's son. Might be too much to swallow at this point if he turned out to be, though. A fourth son is perfectly believable, mind you, for the man in control of the world -- but as a literary device, it would be a little bit old hat.
Still, I wouldn't mind it if it happened, and would probably still like it despite it meaning he would have three brothers instead of just Rufus. I like Evan and his backstory. So, it's not like Cloud would be in bad company genetically. Even Lazard became pretty likable by the time he died.
Anywho, thanks so much for these summaries, hito. You're so fast it's scary. On my own, I had made sense of only the first chapter by the time you had posted your first summary with the first five chapters.
I thought it was interesting, by the way, that Cloud wouldn't talk about Nibelheim.